Factors and Multiples
Key Stage: 3 ★★
If Charlie is thinking of a number that is both a multiple of 5 and 6, what might his number be? Can you answer some other similar questions?
This problem gives a context for the systematic search for solutions, looking for efficient strategies, and reflecting on which aspects of the problem causes it to be harder/easier. The task could provide an interesting context for practising routine tables facts. The random question generator could be used in lesson starters.
This resource has comprehensive teachers' notes and resources, linked from the problem page. This includes possible approaches and key questions, as well as possible support and extensions.
The file attached is a HTML file, which, when opened, automatically redirects you to the problem on the NRICH website.
Key Stage: 3 ★★
If Charlie is thinking of a number that is both a multiple of 5 and 6, what might his number be? Can you answer some other similar questions?
This problem gives a context for the systematic search for solutions, looking for efficient strategies, and reflecting on which aspects of the problem causes it to be harder/easier. The task could provide an interesting context for practising routine tables facts. The random question generator could be used in lesson starters.
This resource has comprehensive teachers' notes and resources, linked from the problem page. This includes possible approaches and key questions, as well as possible support and extensions.
The file attached is a HTML file, which, when opened, automatically redirects you to the problem on the NRICH website.
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